A triphos-modified tungsten piano-stool complex for the homogeneous (conjugate) hydrogenation of ketones and esters

We disclose the synthesis, characterization, and catalytic application of a triphos-tagged, non-pincer-type tungsten complex. The pertinent W-based half-sandwich compound was used in homogeneous hydrogenation ketones esters to afford corresponding alcohols. Furthermore, introduced base metal catalyst facilitated conjugate reduction enoates yield respective CC-bond-free esters. Most applied substrate were convertible under very mild reaction conditions (room temperature, 5 bar H2) presence t–BuONa. exchange cation auxiliary from Na+ Li+ turned out be crucial for successful carbonyl ester group. deployed organometallic complex is readily weighable can handled on laboratory bench outside sealed glove box system.